static ACPI_STATUS
AeExceptionHandler (
ACPI_STATUS AmlStatus,
ACPI_NAME Name,
UINT16 Opcode,
UINT32 AmlOffset,
void *Context)
{
ACPI_STATUS NewAmlStatus = AmlStatus;
ACPI_STATUS Status;
ACPI_BUFFER ReturnObj;
ACPI_OBJECT_LIST ArgList;
ACPI_OBJECT Arg[3];
const char *Exception;
Exception = AcpiFormatException (AmlStatus);
AcpiOsPrintf ("[AcpiExec] Exception %s during execution ", Exception);
if (Name)
{
AcpiOsPrintf ("of method [%4.4s]", (char *) &Name);
}
else
{
AcpiOsPrintf ("at module level (table load)");
}
AcpiOsPrintf (" Opcode [%s] @%X\n", AcpiPsGetOpcodeName (Opcode), AmlOffset);
/*
* Invoke the _ERR method if present
*
* Setup parameter object
*/
ArgList.Count = 3;
ArgList.Pointer = Arg;
Arg[0].Type = ACPI_TYPE_INTEGER;
Arg[0].Integer.Value = AmlStatus;
Arg[1].Type = ACPI_TYPE_STRING;
Arg[1].String.Pointer = ACPI_CAST_PTR (char, Exception);
Arg[1].String.Length = ACPI_STRLEN (Exception);
Arg[2].Type = ACPI_TYPE_INTEGER;
Arg[2].Integer.Value = AcpiOsGetThreadId();
/* Setup return buffer */
ReturnObj.Pointer = NULL;
ReturnObj.Length = ACPI_ALLOCATE_BUFFER;
Status = AcpiEvaluateObject (NULL, "\\_ERR", &ArgList, &ReturnObj);
if (ACPI_SUCCESS (Status))
{
if (ReturnObj.Pointer)
{
/* Override original status */
NewAmlStatus = (ACPI_STATUS)
((ACPI_OBJECT *) ReturnObj.Pointer)->Integer.Value;
/* Free a buffer created via ACPI_ALLOCATE_BUFFER */
AcpiOsFree (ReturnObj.Pointer);
}
}
else if (Status != AE_NOT_FOUND)
{
AcpiOsPrintf ("[AcpiExec] Could not execute _ERR method, %s\n",
AcpiFormatException (Status));
}
/* Global override */
if (AcpiGbl_IgnoreErrors)
{
NewAmlStatus = AE_OK;
}
if (NewAmlStatus != AmlStatus)
{
AcpiOsPrintf ("[AcpiExec] Exception override, new status %s\n",
AcpiFormatException (NewAmlStatus));
}
return (NewAmlStatus);
}
static void ACPI_SYSTEM_XFACE
AcpiDbMethodThread (
void *Context)
{
ACPI_STATUS Status;
ACPI_DB_METHOD_INFO *Info = Context;
ACPI_DB_METHOD_INFO LocalInfo;
UINT32 i;
UINT8 Allow;
ACPI_BUFFER ReturnObj;
/*
* AcpiGbl_DbMethodInfo.Arguments will be passed as method arguments.
* Prevent AcpiGbl_DbMethodInfo from being modified by multiple threads
* concurrently.
*
* Note: The arguments we are passing are used by the ASL test suite
* (aslts). Do not change them without updating the tests.
*/
(void) AcpiOsWaitSemaphore (Info->InfoGate, 1, ACPI_WAIT_FOREVER);
if (Info->InitArgs)
{
AcpiDbUint32ToHexString (Info->NumCreated, Info->IndexOfThreadStr);
AcpiDbUint32ToHexString ((UINT32) AcpiOsGetThreadId (), Info->IdOfThreadStr);
}
if (Info->Threads && (Info->NumCreated < Info->NumThreads))
{
Info->Threads[Info->NumCreated++] = AcpiOsGetThreadId();
}
LocalInfo = *Info;
LocalInfo.Args = LocalInfo.Arguments;
LocalInfo.Arguments[0] = LocalInfo.NumThreadsStr;
LocalInfo.Arguments[1] = LocalInfo.IdOfThreadStr;
LocalInfo.Arguments[2] = LocalInfo.IndexOfThreadStr;
LocalInfo.Arguments[3] = NULL;
LocalInfo.Types = LocalInfo.ArgTypes;
(void) AcpiOsSignalSemaphore (Info->InfoGate, 1);
for (i = 0; i < Info->NumLoops; i++)
{
Status = AcpiDbExecuteMethod (&LocalInfo, &ReturnObj);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("%s During evaluation of %s at iteration %X\n",
AcpiFormatException (Status), Info->Pathname, i);
if (Status == AE_ABORT_METHOD)
{
break;
}
}
#if 0
if ((i % 100) == 0)
{
AcpiOsPrintf ("%u loops, Thread 0x%x\n", i, AcpiOsGetThreadId ());
}
if (ReturnObj.Length)
{
AcpiOsPrintf ("Evaluation of %s returned object %p Buflen %X\n",
Info->Pathname, ReturnObj.Pointer, (UINT32) ReturnObj.Length);
AcpiDbDumpExternalObject (ReturnObj.Pointer, 1);
}
#endif
}
/* Signal our completion */
Allow = 0;
(void) AcpiOsWaitSemaphore (Info->ThreadCompleteGate, 1, ACPI_WAIT_FOREVER);
Info->NumCompleted++;
if (Info->NumCompleted == Info->NumThreads)
{
/* Do signal for main thread once only */
Allow = 1;
}
(void) AcpiOsSignalSemaphore (Info->ThreadCompleteGate, 1);
if (Allow)
{
Status = AcpiOsSignalSemaphore (Info->MainThreadGate, 1);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Could not signal debugger thread sync semaphore, %s\n",
AcpiFormatException (Status));
}
}
}
void ACPI_INTERNAL_VAR_XFACE
AcpiDebugPrint (
UINT32 RequestedDebugLevel,
UINT32 LineNumber,
const char *FunctionName,
const char *ModuleName,
UINT32 ComponentId,
const char *Format,
...)
{
ACPI_THREAD_ID ThreadId;
va_list args;
/* Check if debug output enabled */
if (!ACPI_IS_DEBUG_ENABLED (RequestedDebugLevel, ComponentId))
{
return;
}
/*
* Thread tracking and context switch notification
*/
ThreadId = AcpiOsGetThreadId ();
if (ThreadId != AcpiGbl_PrevThreadId)
{
if (ACPI_LV_THREADS & AcpiDbgLevel)
{
AcpiOsPrintf (
"\n**** Context Switch from TID %u to TID %u ****\n\n",
(UINT32) AcpiGbl_PrevThreadId, (UINT32) ThreadId);
}
AcpiGbl_PrevThreadId = ThreadId;
AcpiGbl_NestingLevel = 0;
}
/*
* Display the module name, current line number, thread ID (if requested),
* current procedure nesting level, and the current procedure name
*/
AcpiOsPrintf ("%9s-%04ld ", ModuleName, LineNumber);
#ifdef ACPI_APPLICATION
/*
* For AcpiExec/iASL only, emit the thread ID and nesting level.
* Note: nesting level is really only useful during a single-thread
* execution. Otherwise, multiple threads will keep resetting the
* level.
*/
if (ACPI_LV_THREADS & AcpiDbgLevel)
{
AcpiOsPrintf ("[%u] ", (UINT32) ThreadId);
}
AcpiOsPrintf ("[%02ld] ", AcpiGbl_NestingLevel);
#endif
AcpiOsPrintf ("%-22.22s: ", AcpiUtTrimFunctionName (FunctionName));
va_start (args, Format);
AcpiOsVprintf (Format, args);
va_end (args);
}
ACPI_STATUS
AcpiOsWaitSemaphore(ACPI_HANDLE Handle, UINT32 Units, UINT16 Timeout)
{
#ifndef ACPI_NO_SEMAPHORES
ACPI_STATUS result;
struct acpi_semaphore *as = (struct acpi_semaphore *)Handle;
int rv, tmo;
struct timeval timeouttv, currenttv, timelefttv;
AS_LOCK_DECL;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
if (as == NULL)
return_ACPI_STATUS (AE_BAD_PARAMETER);
if (cold)
return_ACPI_STATUS (AE_OK);
#if 0
if (as->as_units < Units && as->as_timeouts > 10) {
kprintf("%s: semaphore %p too many timeouts, resetting\n", __func__, as);
AS_LOCK(as);
as->as_units = as->as_maxunits;
if (as->as_pendings)
as->as_resetting = 1;
as->as_timeouts = 0;
wakeup(as);
AS_UNLOCK(as);
return_ACPI_STATUS (AE_TIME);
}
if (as->as_resetting)
return_ACPI_STATUS (AE_TIME);
#endif
/* a timeout of ACPI_WAIT_FOREVER means "forever" */
if (Timeout == ACPI_WAIT_FOREVER) {
tmo = 0;
timeouttv.tv_sec = ((0xffff/1000) + 1); /* cf. ACPI spec */
timeouttv.tv_usec = 0;
} else {
/* compute timeout using microseconds per tick */
tmo = (Timeout * 1000) / (1000000 / hz);
if (tmo <= 0)
tmo = 1;
timeouttv.tv_sec = Timeout / 1000;
timeouttv.tv_usec = (Timeout % 1000) * 1000;
}
/* calculate timeout value in timeval */
getmicrouptime(¤ttv);
timevaladd(&timeouttv, ¤ttv);
AS_LOCK(as);
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"get %d units from semaphore %p (has %d), timeout %d\n",
Units, as, as->as_units, Timeout));
for (;;) {
if (as->as_maxunits == ACPI_NO_UNIT_LIMIT) {
result = AE_OK;
break;
}
if (as->as_units >= Units) {
as->as_units -= Units;
result = AE_OK;
break;
}
/* limit number of pending treads */
if (as->as_pendings >= ACPI_SEMAPHORES_MAX_PENDING) {
result = AE_TIME;
break;
}
/* if timeout values of zero is specified, return immediately */
if (Timeout == 0) {
result = AE_TIME;
break;
}
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
"semaphore blocked, calling ssleep(%p, %p, %d, \"acsem\", %d)\n",
as, &as->as_spin, PCATCH, tmo));
as->as_pendings++;
if (acpi_semaphore_debug) {
kprintf("%s: Sleep %jd, pending %jd, semaphore %p, thread %jd\n",
__func__, (intmax_t)Timeout,
(intmax_t)as->as_pendings, as,
(intmax_t)AcpiOsGetThreadId());
}
rv = ssleep(as, &as->as_spin, PCATCH, "acsem", tmo);
as->as_pendings--;
#if 0
if (as->as_resetting) {
/* semaphore reset, return immediately */
if (as->as_pendings == 0) {
as->as_resetting = 0;
}
result = AE_TIME;
break;
}
#endif
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "ssleep(%d) returned %d\n", tmo, rv));
if (rv == EWOULDBLOCK) {
result = AE_TIME;
break;
}
/* check if we already awaited enough */
timelefttv = timeouttv;
getmicrouptime(¤ttv);
timevalsub(&timelefttv, ¤ttv);
if (timelefttv.tv_sec < 0) {
ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "await semaphore %p timeout\n",
as));
result = AE_TIME;
break;
}
/* adjust timeout for the next sleep */
tmo = (timelefttv.tv_sec * 1000000 + timelefttv.tv_usec) /
(1000000 / hz);
if (tmo <= 0)
tmo = 1;
if (acpi_semaphore_debug) {
kprintf("%s: Wakeup timeleft(%ju, %ju), tmo %ju, sem %p, thread %jd\n",
__func__,
(intmax_t)timelefttv.tv_sec, (intmax_t)timelefttv.tv_usec,
(intmax_t)tmo, as, (intmax_t)AcpiOsGetThreadId());
}
}
if (acpi_semaphore_debug) {
if (result == AE_TIME && Timeout > 0) {
kprintf("%s: Timeout %d, pending %d, semaphore %p\n",
__func__, Timeout, as->as_pendings, as);
}
if (ACPI_SUCCESS(result) &&
(as->as_timeouts > 0 || as->as_pendings > 0))
{
kprintf("%s: Acquire %d, units %d, pending %d, sem %p, thread %jd\n",
__func__, Units, as->as_units, as->as_pendings, as,
(intmax_t)AcpiOsGetThreadId());
}
}
if (result == AE_TIME)
as->as_timeouts++;
else
as->as_timeouts = 0;
AS_UNLOCK(as);
return_ACPI_STATUS (result);
#else
return_ACPI_STATUS (AE_OK);
#endif /* !ACPI_NO_SEMAPHORES */
}
ACPI_STATUS
AcpiUtReleaseMutex (
ACPI_MUTEX_HANDLE MutexId)
{
ACPI_THREAD_ID ThisThreadId;
ACPI_FUNCTION_NAME (UtReleaseMutex);
ThisThreadId = AcpiOsGetThreadId ();
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u releasing Mutex [%s]\n",
(UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId)));
if (MutexId > ACPI_MAX_MUTEX)
{
return (AE_BAD_PARAMETER);
}
/*
* Mutex must be acquired in order to release it!
*/
if (AcpiGbl_MutexInfo[MutexId].ThreadId == ACPI_MUTEX_NOT_ACQUIRED)
{
ACPI_ERROR ((AE_INFO,
"Mutex [0x%X] is not acquired, cannot release", MutexId));
return (AE_NOT_ACQUIRED);
}
#ifdef ACPI_MUTEX_DEBUG
{
UINT32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than this one. If so, the thread has violated the mutex
* ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = MutexId; i < ACPI_NUM_MUTEX; i++)
{
if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId)
{
if (i == MutexId)
{
continue;
}
ACPI_ERROR ((AE_INFO,
"Invalid release order: owns [%s], releasing [%s]",
AcpiUtGetMutexName (i), AcpiUtGetMutexName (MutexId)));
return (AE_RELEASE_DEADLOCK);
}
}
}
#endif
/* Mark unlocked FIRST */
AcpiGbl_MutexInfo[MutexId].ThreadId = ACPI_MUTEX_NOT_ACQUIRED;
AcpiOsReleaseMutex (AcpiGbl_MutexInfo[MutexId].Mutex);
return (AE_OK);
}
ACPI_STATUS
AcpiDsBeginMethodExecution (
ACPI_NAMESPACE_NODE *MethodNode,
ACPI_OPERAND_OBJECT *ObjDesc,
ACPI_WALK_STATE *WalkState)
{
ACPI_STATUS Status = AE_OK;
ACPI_FUNCTION_TRACE_PTR (DsBeginMethodExecution, MethodNode);
if (!MethodNode)
{
return_ACPI_STATUS (AE_NULL_ENTRY);
}
AcpiExStartTraceMethod (MethodNode, ObjDesc, WalkState);
/* Prevent wraparound of thread count */
if (ObjDesc->Method.ThreadCount == ACPI_UINT8_MAX)
{
ACPI_ERROR ((AE_INFO,
"Method reached maximum reentrancy limit (255)"));
return_ACPI_STATUS (AE_AML_METHOD_LIMIT);
}
/*
* If this method is serialized, we need to acquire the method mutex.
*/
if (ObjDesc->Method.InfoFlags & ACPI_METHOD_SERIALIZED)
{
/*
* Create a mutex for the method if it is defined to be Serialized
* and a mutex has not already been created. We defer the mutex creation
* until a method is actually executed, to minimize the object count
*/
if (!ObjDesc->Method.Mutex)
{
Status = AcpiDsCreateMethodMutex (ObjDesc);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
}
/*
* The CurrentSyncLevel (per-thread) must be less than or equal to
* the sync level of the method. This mechanism provides some
* deadlock prevention.
*
* If the method was auto-serialized, we just ignore the sync level
* mechanism, because auto-serialization of methods can interfere
* with ASL code that actually uses sync levels.
*
* Top-level method invocation has no walk state at this point
*/
if (WalkState &&
(!(ObjDesc->Method.InfoFlags & ACPI_METHOD_IGNORE_SYNC_LEVEL)) &&
(WalkState->Thread->CurrentSyncLevel >
ObjDesc->Method.Mutex->Mutex.SyncLevel))
{
ACPI_ERROR ((AE_INFO,
"Cannot acquire Mutex for method [%4.4s]"
", current SyncLevel is too large (%u)",
AcpiUtGetNodeName (MethodNode),
WalkState->Thread->CurrentSyncLevel));
return_ACPI_STATUS (AE_AML_MUTEX_ORDER);
}
/*
* Obtain the method mutex if necessary. Do not acquire mutex for a
* recursive call.
*/
if (!WalkState ||
!ObjDesc->Method.Mutex->Mutex.ThreadId ||
(WalkState->Thread->ThreadId !=
ObjDesc->Method.Mutex->Mutex.ThreadId))
{
/*
* Acquire the method mutex. This releases the interpreter if we
* block (and reacquires it before it returns)
*/
Status = AcpiExSystemWaitMutex (
ObjDesc->Method.Mutex->Mutex.OsMutex, ACPI_WAIT_FOREVER);
if (ACPI_FAILURE (Status))
{
return_ACPI_STATUS (Status);
}
/* Update the mutex and walk info and save the original SyncLevel */
if (WalkState)
{
ObjDesc->Method.Mutex->Mutex.OriginalSyncLevel =
WalkState->Thread->CurrentSyncLevel;
ObjDesc->Method.Mutex->Mutex.ThreadId =
WalkState->Thread->ThreadId;
/*
* Update the current SyncLevel only if this is not an auto-
* serialized method. In the auto case, we have to ignore
* the sync level for the method mutex (created for the
* auto-serialization) because we have no idea of what the
* sync level should be. Therefore, just ignore it.
*/
if (!(ObjDesc->Method.InfoFlags &
ACPI_METHOD_IGNORE_SYNC_LEVEL))
{
WalkState->Thread->CurrentSyncLevel =
ObjDesc->Method.SyncLevel;
}
}
else
{
ObjDesc->Method.Mutex->Mutex.OriginalSyncLevel =
ObjDesc->Method.Mutex->Mutex.SyncLevel;
ObjDesc->Method.Mutex->Mutex.ThreadId =
AcpiOsGetThreadId ();
}
}
/* Always increase acquisition depth */
ObjDesc->Method.Mutex->Mutex.AcquisitionDepth++;
}
/*
* Allocate an Owner ID for this method, only if this is the first thread
* to begin concurrent execution. We only need one OwnerId, even if the
* method is invoked recursively.
*/
if (!ObjDesc->Method.OwnerId)
{
Status = AcpiUtAllocateOwnerId (&ObjDesc->Method.OwnerId);
if (ACPI_FAILURE (Status))
{
goto Cleanup;
}
}
/*
* Increment the method parse tree thread count since it has been
* reentered one more time (even if it is the same thread)
*/
ObjDesc->Method.ThreadCount++;
AcpiMethodCount++;
return_ACPI_STATUS (Status);
Cleanup:
/* On error, must release the method mutex (if present) */
if (ObjDesc->Method.Mutex)
{
AcpiOsReleaseMutex (ObjDesc->Method.Mutex->Mutex.OsMutex);
}
return_ACPI_STATUS (Status);
}
ACPI_STATUS
AcpiUtAcquireMutex (
ACPI_MUTEX_HANDLE MutexId)
{
ACPI_STATUS Status;
ACPI_THREAD_ID ThisThreadId;
ACPI_FUNCTION_NAME (UtAcquireMutex);
if (MutexId > ACPI_MAX_MUTEX)
{
return (AE_BAD_PARAMETER);
}
ThisThreadId = AcpiOsGetThreadId ();
#ifdef ACPI_MUTEX_DEBUG
{
UINT32 i;
/*
* Mutex debug code, for internal debugging only.
*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = MutexId; i < ACPI_NUM_MUTEX; i++)
{
if (AcpiGbl_MutexInfo[i].ThreadId == ThisThreadId)
{
if (i == MutexId)
{
ACPI_ERROR ((AE_INFO,
"Mutex [%s] already acquired by this thread [%u]",
AcpiUtGetMutexName (MutexId),
(UINT32) ThisThreadId));
return (AE_ALREADY_ACQUIRED);
}
ACPI_ERROR ((AE_INFO,
"Invalid acquire order: Thread %u owns [%s], wants [%s]",
(UINT32) ThisThreadId, AcpiUtGetMutexName (i),
AcpiUtGetMutexName (MutexId)));
return (AE_ACQUIRE_DEADLOCK);
}
}
}
#endif
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %u attempting to acquire Mutex [%s]\n",
(UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId)));
Status = AcpiOsAcquireMutex (AcpiGbl_MutexInfo[MutexId].Mutex,
ACPI_WAIT_FOREVER);
if (ACPI_SUCCESS (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %u acquired Mutex [%s]\n",
(UINT32) ThisThreadId, AcpiUtGetMutexName (MutexId)));
AcpiGbl_MutexInfo[MutexId].UseCount++;
AcpiGbl_MutexInfo[MutexId].ThreadId = ThisThreadId;
}
else
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Thread %u could not acquire Mutex [0x%X]",
(UINT32) ThisThreadId, MutexId));
}
return (Status);
}
ACPI_STATUS
AcpiInitializeDebugger (
void)
{
ACPI_STATUS Status;
ACPI_FUNCTION_TRACE (AcpiInitializeDebugger);
/* Init globals */
AcpiGbl_DbBuffer = NULL;
AcpiGbl_DbFilename = NULL;
AcpiGbl_DbOutputToFile = FALSE;
AcpiGbl_DbDebugLevel = ACPI_LV_VERBOSITY2;
AcpiGbl_DbConsoleDebugLevel = ACPI_NORMAL_DEFAULT | ACPI_LV_TABLES;
AcpiGbl_DbOutputFlags = ACPI_DB_CONSOLE_OUTPUT;
AcpiGbl_DbOpt_NoIniMethods = FALSE;
AcpiGbl_DbBuffer = AcpiOsAllocate (ACPI_DEBUG_BUFFER_SIZE);
if (!AcpiGbl_DbBuffer)
{
return_ACPI_STATUS (AE_NO_MEMORY);
}
memset (AcpiGbl_DbBuffer, 0, ACPI_DEBUG_BUFFER_SIZE);
/* Initial scope is the root */
AcpiGbl_DbScopeBuf [0] = AML_ROOT_PREFIX;
AcpiGbl_DbScopeBuf [1] = 0;
AcpiGbl_DbScopeNode = AcpiGbl_RootNode;
/* Initialize user commands loop */
AcpiGbl_DbTerminateLoop = FALSE;
/*
* If configured for multi-thread support, the debug executor runs in
* a separate thread so that the front end can be in another address
* space, environment, or even another machine.
*/
if (AcpiGbl_DebuggerConfiguration & DEBUGGER_MULTI_THREADED)
{
/* These were created with one unit, grab it */
Status = AcpiOsAcquireMutex (AcpiGbl_DbCommandComplete,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Could not get debugger mutex\n");
return_ACPI_STATUS (Status);
}
Status = AcpiOsAcquireMutex (AcpiGbl_DbCommandReady,
ACPI_WAIT_FOREVER);
if (ACPI_FAILURE (Status))
{
AcpiOsPrintf ("Could not get debugger mutex\n");
return_ACPI_STATUS (Status);
}
/* Create the debug execution thread to execute commands */
AcpiGbl_DbThreadsTerminated = FALSE;
Status = AcpiOsExecute (OSL_DEBUGGER_MAIN_THREAD,
AcpiDbExecuteThread, NULL);
if (ACPI_FAILURE (Status))
{
ACPI_EXCEPTION ((AE_INFO, Status,
"Could not start debugger thread"));
AcpiGbl_DbThreadsTerminated = TRUE;
return_ACPI_STATUS (Status);
}
}
else
{
AcpiGbl_DbThreadId = AcpiOsGetThreadId ();
}
return_ACPI_STATUS (AE_OK);
}
ACPI_STATUS
AcpiDbSingleStep (
ACPI_WALK_STATE *WalkState,
ACPI_PARSE_OBJECT *Op,
UINT32 OpcodeClass)
{
ACPI_PARSE_OBJECT *Next;
ACPI_STATUS Status = AE_OK;
UINT32 OriginalDebugLevel;
ACPI_PARSE_OBJECT *DisplayOp;
ACPI_PARSE_OBJECT *ParentOp;
UINT32 AmlOffset;
ACPI_FUNCTION_ENTRY ();
#ifndef ACPI_APPLICATION
if (AcpiGbl_DbThreadId != AcpiOsGetThreadId ())
{
return (AE_OK);
}
#endif
/* Check the abort flag */
if (AcpiGbl_AbortMethod)
{
AcpiGbl_AbortMethod = FALSE;
return (AE_ABORT_METHOD);
}
AmlOffset = (UINT32) ACPI_PTR_DIFF (Op->Common.Aml,
WalkState->ParserState.AmlStart);
/* Check for single-step breakpoint */
if (WalkState->MethodBreakpoint &&
(WalkState->MethodBreakpoint <= AmlOffset))
{
/* Check if the breakpoint has been reached or passed */
/* Hit the breakpoint, resume single step, reset breakpoint */
AcpiOsPrintf ("***Break*** at AML offset %X\n", AmlOffset);
AcpiGbl_CmSingleStep = TRUE;
AcpiGbl_StepToNextCall = FALSE;
WalkState->MethodBreakpoint = 0;
}
/* Check for user breakpoint (Must be on exact Aml offset) */
else if (WalkState->UserBreakpoint &&
(WalkState->UserBreakpoint == AmlOffset))
{
AcpiOsPrintf ("***UserBreakpoint*** at AML offset %X\n",
AmlOffset);
AcpiGbl_CmSingleStep = TRUE;
AcpiGbl_StepToNextCall = FALSE;
WalkState->MethodBreakpoint = 0;
}
/*
* Check if this is an opcode that we are interested in --
* namely, opcodes that have arguments
*/
if (Op->Common.AmlOpcode == AML_INT_NAMEDFIELD_OP)
{
return (AE_OK);
}
switch (OpcodeClass)
{
case AML_CLASS_UNKNOWN:
case AML_CLASS_ARGUMENT: /* constants, literals, etc. do nothing */
return (AE_OK);
default:
/* All other opcodes -- continue */
break;
}
/*
* Under certain debug conditions, display this opcode and its operands
*/
if ((AcpiGbl_DbOutputToFile) ||
(AcpiGbl_CmSingleStep) ||
(AcpiDbgLevel & ACPI_LV_PARSE))
{
if ((AcpiGbl_DbOutputToFile) ||
(AcpiDbgLevel & ACPI_LV_PARSE))
{
AcpiOsPrintf ("\n[AmlDebug] Next AML Opcode to execute:\n");
}
/*
* Display this op (and only this op - zero out the NEXT field
* temporarily, and disable parser trace output for the duration of
* the display because we don't want the extraneous debug output)
*/
OriginalDebugLevel = AcpiDbgLevel;
AcpiDbgLevel &= ~(ACPI_LV_PARSE | ACPI_LV_FUNCTIONS);
Next = Op->Common.Next;
Op->Common.Next = NULL;
DisplayOp = Op;
ParentOp = Op->Common.Parent;
if (ParentOp)
{
if ((WalkState->ControlState) &&
(WalkState->ControlState->Common.State ==
ACPI_CONTROL_PREDICATE_EXECUTING))
{
/*
* We are executing the predicate of an IF or WHILE statement
* Search upwards for the containing IF or WHILE so that the
* entire predicate can be displayed.
*/
while (ParentOp)
{
if ((ParentOp->Common.AmlOpcode == AML_IF_OP) ||
(ParentOp->Common.AmlOpcode == AML_WHILE_OP))
{
DisplayOp = ParentOp;
break;
}
ParentOp = ParentOp->Common.Parent;
}
}
else
{
while (ParentOp)
{
if ((ParentOp->Common.AmlOpcode == AML_IF_OP) ||
(ParentOp->Common.AmlOpcode == AML_ELSE_OP) ||
(ParentOp->Common.AmlOpcode == AML_SCOPE_OP) ||
(ParentOp->Common.AmlOpcode == AML_METHOD_OP) ||
(ParentOp->Common.AmlOpcode == AML_WHILE_OP))
{
break;
}
DisplayOp = ParentOp;
ParentOp = ParentOp->Common.Parent;
}
}
}
/* Now we can display it */
#ifdef ACPI_DISASSEMBLER
AcpiDmDisassemble (WalkState, DisplayOp, ACPI_UINT32_MAX);
#endif
if ((Op->Common.AmlOpcode == AML_IF_OP) ||
(Op->Common.AmlOpcode == AML_WHILE_OP))
{
if (WalkState->ControlState->Common.Value)
{
AcpiOsPrintf ("Predicate = [True], IF block was executed\n");
}
else
{
AcpiOsPrintf ("Predicate = [False], Skipping IF block\n");
}
}
else if (Op->Common.AmlOpcode == AML_ELSE_OP)
{
AcpiOsPrintf ("Predicate = [False], ELSE block was executed\n");
}
/* Restore everything */
Op->Common.Next = Next;
AcpiOsPrintf ("\n");
if ((AcpiGbl_DbOutputToFile) ||
(AcpiDbgLevel & ACPI_LV_PARSE))
{
AcpiOsPrintf ("\n");
}
AcpiDbgLevel = OriginalDebugLevel;
}
/* If we are not single stepping, just continue executing the method */
if (!AcpiGbl_CmSingleStep)
{
return (AE_OK);
}
/*
* If we are executing a step-to-call command,
* Check if this is a method call.
*/
if (AcpiGbl_StepToNextCall)
{
if (Op->Common.AmlOpcode != AML_INT_METHODCALL_OP)
{
/* Not a method call, just keep executing */
return (AE_OK);
}
/* Found a method call, stop executing */
AcpiGbl_StepToNextCall = FALSE;
}
/*
* If the next opcode is a method call, we will "step over" it
* by default.
*/
if (Op->Common.AmlOpcode == AML_INT_METHODCALL_OP)
{
/* Force no more single stepping while executing called method */
AcpiGbl_CmSingleStep = FALSE;
/*
* Set the breakpoint on/before the call, it will stop execution
* as soon as we return
*/
WalkState->MethodBreakpoint = 1; /* Must be non-zero! */
}
Status = AcpiDbStartCommand (WalkState, Op);
/* User commands complete, continue execution of the interrupted method */
return (Status);
}
ACPI_STATUS
AcpiUtReleaseMutex (
ACPI_MUTEX_HANDLE MutexId)
{
ACPI_STATUS Status;
UINT32 i;
UINT32 ThisThreadId;
ACPI_FUNCTION_NAME ("UtReleaseMutex");
ThisThreadId = AcpiOsGetThreadId ();
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X releasing Mutex [%s]\n", ThisThreadId,
AcpiUtGetMutexName (MutexId)));
if (MutexId > MAX_MTX)
{
return (AE_BAD_PARAMETER);
}
/*
* Mutex must be acquired in order to release it!
*/
if (AcpiGbl_AcpiMutexInfo[MutexId].OwnerId == ACPI_MUTEX_NOT_ACQUIRED)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] is not acquired, cannot release\n",
AcpiUtGetMutexName (MutexId)));
return (AE_NOT_ACQUIRED);
}
/*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than this one. If so, the thread has violated the mutex
* ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = MutexId; i < MAX_MTX; i++)
{
if (AcpiGbl_AcpiMutexInfo[i].OwnerId == ThisThreadId)
{
if (i == MutexId)
{
continue;
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid release order: owns [%s], releasing [%s]\n",
AcpiUtGetMutexName (i), AcpiUtGetMutexName (MutexId)));
return (AE_RELEASE_DEADLOCK);
}
}
/* Mark unlocked FIRST */
AcpiGbl_AcpiMutexInfo[MutexId].OwnerId = ACPI_MUTEX_NOT_ACQUIRED;
Status = AcpiOsSignalSemaphore (AcpiGbl_AcpiMutexInfo[MutexId].Mutex, 1);
if (ACPI_FAILURE (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Thread %X could not release Mutex [%s] %s\n",
ThisThreadId, AcpiUtGetMutexName (MutexId),
AcpiFormatException (Status)));
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X released Mutex [%s]\n",
ThisThreadId, AcpiUtGetMutexName (MutexId)));
}
return (Status);
}
ACPI_STATUS
AcpiUtAcquireMutex (
ACPI_MUTEX_HANDLE MutexId)
{
ACPI_STATUS Status;
UINT32 i;
UINT32 ThisThreadId;
ACPI_FUNCTION_NAME ("UtAcquireMutex");
if (MutexId > MAX_MTX)
{
return (AE_BAD_PARAMETER);
}
ThisThreadId = AcpiOsGetThreadId ();
/*
* Deadlock prevention. Check if this thread owns any mutexes of value
* greater than or equal to this one. If so, the thread has violated
* the mutex ordering rule. This indicates a coding error somewhere in
* the ACPI subsystem code.
*/
for (i = MutexId; i < MAX_MTX; i++)
{
if (AcpiGbl_AcpiMutexInfo[i].OwnerId == ThisThreadId)
{
if (i == MutexId)
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Mutex [%s] already acquired by this thread [%X]\n",
AcpiUtGetMutexName (MutexId), ThisThreadId));
return (AE_ALREADY_ACQUIRED);
}
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
"Invalid acquire order: Thread %X owns [%s], wants [%s]\n",
ThisThreadId, AcpiUtGetMutexName (i),
AcpiUtGetMutexName (MutexId)));
return (AE_ACQUIRE_DEADLOCK);
}
}
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX,
"Thread %X attempting to acquire Mutex [%s]\n",
ThisThreadId, AcpiUtGetMutexName (MutexId)));
Status = AcpiOsWaitSemaphore (AcpiGbl_AcpiMutexInfo[MutexId].Mutex,
1, ACPI_WAIT_FOREVER);
if (ACPI_SUCCESS (Status))
{
ACPI_DEBUG_PRINT ((ACPI_DB_MUTEX, "Thread %X acquired Mutex [%s]\n",
ThisThreadId, AcpiUtGetMutexName (MutexId)));
AcpiGbl_AcpiMutexInfo[MutexId].UseCount++;
AcpiGbl_AcpiMutexInfo[MutexId].OwnerId = ThisThreadId;
}
else
{
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR, "Thread %X could not acquire Mutex [%s] %s\n",
ThisThreadId, AcpiUtGetMutexName (MutexId),
AcpiFormatException (Status)));
}
return (Status);
}